The Colorado football program has been handed plenty of excuses this year. First, the Buffaloes had their head coach of just 14 months, Mel Tucker, suddenly leave in mid-February. That led to hiring Karl Dorrell as his replacement on Feb. 23 – about two months after most teams fill vacancies. Just a couple weeks after Dorrell was hired, the coronavirus pandemic canceled spring practices and forced him to wait more than seven months to conduct his first official practice. Throw in the fact that the Buffs had almost no experience at quarterback, lost their best player from 2019 to the NFL and were coming off three consecutive losing seasons, and it was pretty easy for pundits to predict a dismal season for CU. All along, Dorrell has refused to make excuses, his players have bought into that approach and they’re now sitting at 3-0 (2-0 in the Pac-12) with a chance to compete for the South division title during the final two weeks of the truncated season, including Saturday at Arizona (5 p.m., TV: FS-1). “It’s been a big part (of the success), it’s no question on that,” Dorrell said Monday as the Buffs began preparations for Arizona (0-3, 0-3).